sea urchins

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sea-urchin pathogen
California Sea Grant/Flickr/Credit: Jenn Caselle/Commercial use & mods allowedhttps://creativecommons.org/licenses/by-sa/2.0/

The sea-urchin murderer has finally been apprehended

Most such mysteries go unsolved. But in this case, a crack team of scientists quickly found a culprit.
The cutest way to fight climate change? Send in the otters

The cutest way to fight climate change? Send in the otters

Saving California's adorable (and very hungry) sea otters helps control other species, leading to the growth of more carbon-sequestering vegetation.
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kelp forests disappear driving species migration

Hungry tropical fish, sea urchins marching south as kelp forests disappear

They are brightly coloured, beautiful and hungry — tropical fish and sea urchins are thriving in southern waters warmed by climate change. But now they are devastating kelp forests already knocked around by marine heatwaves.   
Massive marine die-off in Russian Far East threatens endangered species
www.nationalgeographic.com

Massive marine die-off in Russian Far East threatens endangered species

Now believed to be caused by an unprecedented algae bloom, the decimation of bottom-dwelling sea life may have devastating ripple effects.
sea urchins decimate Aleutian reefs

Without otter predation, sea urchins decimate Aleutian reefs

In some places surrounding the central and western Aleutian Islands, reefs are crumbling from urchins burrowing through the weakened calcium carbonate structures. 
When the otters vanished, everything else started to crumble
www.nytimes.com

When the otters vanished, everything else started to crumble

Against the backdrop of climate change, the delicate underwater ecology of Alaska’s Aleutian Islands is hurting from declines in otters.
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